{"schema":"threatline.record/2","record":{"id":"CVE-2026-111101","aliases":["GHSA-jwh3-j29h-qfmw"],"summary":"HTTP/1.1 chunked request bodies made of 1-byte chunks amplify memory use in Bandit","details":"Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/1.1 chunked body reader of mtrudel bandit allows an unauthenticated remote attacker to exhaust server memory and CPU via a request body made of many 1-byte chunks.\n\nThe chunked reader in lib/bandit/http1/socket.ex keeps every chunk as its own list cell and binary term until IO.iodata_to_binary/1 joins them, and nothing limits the number of chunks. The :length option of read_body/2 counts only data bytes, so tiny chunks cost far more memory than their payload: 48 MB of 1-byte chunks grew one handler process to about 500 MB and took about 6 s of CPU. The route does not need to read the body, because on keep-alive connections ensure_completed/1 drains unread bodies through the same reader.\n\nThis issue affects bandit: from 0.1.0 before 1.14.0.","categories":["Unclassified"],"product":"bandit","vendor":"mtrudel","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111101","source_modified_at":"2026-10-26T15:35:51.401Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"bandit","vendor":"mtrudel","versions":[{"lessThan":"1.14.0","status":"affected","version":"0.1.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111101","source_modified_at":"2026-10-26T15:35:51.401Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"bandit","vendor":"mtrudel","versions":[{"lessThan":"220b9dfd27f9a21305be2afc75cbe585ddc24e7a","status":"affected","version":"7201270c34b90f6c9e15c0386c2bb802c0c72ab4","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111101","source_modified_at":"2026-10-26T15:35:51.401Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"bandit","ecosystem":null},"version":"1.14.0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111101","source_modified_at":"2026-10-26T15:35:51.401Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"bandit","ecosystem":null},"version":"220b9dfd27f9a21305be2afc75cbe585ddc24e7a","basis":"first unaffected version stated in the CVE record"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T13:31:48.184Z","modified_at":"2026-10-26T15:35:51.401Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111101","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T15:35:51.401Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-jwh3-j29h-qfmw","tags":["vendor-advisory","related"]},{"source":"CVE List","url":"https://cna.erlef.org/cves/CVE-2026-111101.html","tags":["related"]},{"source":"CVE List","url":"https://osv.dev/vulnerability/EEF-CVE-2026-111101","tags":["related"]},{"source":"CVE List","url":"https://github.com/mtrudel/bandit/commit/7201270c34b90f6c9e15c0386c2bb802c0c72ab4","tags":["related"]},{"source":"CVE List","url":"https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-26T15:10:33.224480Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-26T15:35:51.401Z","content_hash":"324e2354d1138ee6d146100dfbdf07a468a65e681dfa0cbb9933c067a9f0cb44"}}